Casting apparatus.



W. C. URBAN.

CASTING APPARATUS.

APPLICATION FILED FBB.13,1913.

1,1 10,659, Patented Sept. 15, 1914.,

2 SHEETS-SHEET I.

Inventor: w.0. Urban Abb'Y s W. C. URBAN.

CASTING APPARATUS.

' APPLICATION FILED FEB. 13,1913. 1,1 10,659. PatentedSept. 15,1914,

2 SHEETS-SHEET. 2.

Inventor:

W.O. Urban mm Abby s WILLIAM C. URBAN, OF GRANITE CITY, ILLINOIS, AS SIGNOR 0F ONE-:HALF TO HOY'J.

METAID COMIANY,

OF ST; LOUIS, MISSOURI, A CORPORATION.

casrine APPARATUS.

1l,lliO,659..

hatented 8ept. 15, 11914.

Application filed February 13, 1913. Serial No. 748,097.

To all whom it may-concern: Be it known that 1, WILLIAM C. 'URBA'N,;

a citizen of the United States of American; residing at Granite City, in the county of; Madison and State of Illinois, have invent; ed certain new and useful Improvements 1n- Casting Apparatus, of which thefollowing is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specificatlon.

My invention relates to anapparatus for making die castings and has for its object the production of a very efficient means for handling molten material whereby the dross which accumulates at the surface of the material in the melting pot is prevented from entering the die or mold. Also, to PI'OVldQ an apparatus for melting metal and forcing the molten metal into a .die by air pressure,

Without liability of injuring the operator.

Another object is to provide means for so confiningthe molten metal that itwill not cool to any appreciable extent in flowing from the melting vpot to .the die or mold.

' Figure I is a vertical section, partly in elevation, of my casting apparatus. Fig. II is a top or plan view,.partly in section. FigIII is a view similar to Fig. 1, showing the :valves and valveoperating devices in difi'erent positions.

In the accompanying draWingsf-ldesignates upright posts connected at their upper ends by a cross bar 2. Hanger rods 3, se-

cured the cross bar 2, support a receptacle 4:. This receptacle is preferably a melting pot, having an outer or primary compartment A, open at the top for the reception of metal to be melted, and an inner or secondary ;compartment.B, in the form of altube adapted to receive molten metal from the outer compartment.

5 designates an admission valve for openmg and closing communication between sad The valve 5 and the passageway controlled thereby is located near the bottom of the melting pot, so that the dross atthe surface of the material in the compartment A cannot enter the inner compartment B. The inner comartment is provided with a closure at its ower'end, said closure having an opening6- through which the molten metal may be discharged into a die 7 Y 8 designates a valve for opening and closing the discharge opening 6, said valve hav- 5 ing a long stem 9 passing through the do sure at the upper end of the compartment B and extending above the transverse frame bar 10 at the upper end of the apparatus. A compression spring 11 for forcing the valve 8 onto. its seat surrounds the valve stem 9, and is' arranged between the bar'l O and a collar 12 on said stem. The means for opening the discharge valve 8 comprises an op- 1 crating handle 13, in the form of a lever pivoted at '14:, and carrying a swiveled device 15 having a lip 16, which lies below the collar 12' and surrounds the valve stem 9.

When the lever 13 is elevated, it carries the swiveled device 16 upwardly into engages ment with the collar 12 and, as said collar is rigidly secured to the valve stem 9, a continued movement of the lever will open the valve 8 and allow the molten metal to flow into the die 7 y Air under pressur'e'is admitted to the upper portion of the chamber B through a pipe 17, the admission of air being controlled by an air valve 18 having an operating handle 19 connected by a link 20 to the lever 13. When the lever 13 is rocked upwardly to open the discharge valve 8, the air valve 18 rocks from the position shown in Fig. 11, thereby allowing the air under pressure to enter the inner compartment B, with the result of forcing the molten metal through the discharge opening 6' and into thedie 7 To cause the air valve 18 to open andadmit the compressed air to the compartment B before the discharge valve 8 opens, the swiveled device 15' is designed so that its lip 16 lies some distance below the collar 12 on the valve rod 9 when both of said valves are closed. Whilethe li. 16 is moving toward metal from the collar 12, the a1r valve 18 opens andthereafter said lip strikes the collar 12, and

continuesits upward movement, with the result of opening the discharge valve 8 and permitting the air under pressure to force the molten metal through the discharge opening 6.

The inner compartment B maybe sup plied with molten metal by opening the admission valve 5, said valve being controlled by a handle 22 secured to the valve stem 23. To permit the escape of air from the inner compartment B while it is receiving molten the outer compartment, the easing of the air valve 18 is provided with a vent 24, (Fig. I), and the valve 18 is provided' with an auxiliary port 25, through which air may pass'from the inner compartment to the main port in valve 18, and thereafter escape through the vent 24.

If the air valve 18 were accidentally opened to admit air under pressure to the inner compartment B While the admission valve is open, it will be noted that the molten metal would be forced through the valve 5 and discharged into the atmosphere through .the open upper end of the outer compartment A. To positively prevent such accidental opening of the air valve 18, the valve stem 23 secured to the admission valve 5 is provided with a stop arm 26 which lies directly over the lever 13 when the admission valve Sisppen, (see Figs. I and II.) This stop arm is located to prevent the lever 18 from being elevated thereby preventing the air valve 18 and discharge valve 8 from being opened While the admission valve 5 occupies its open position. When the admission valve 5 .is closed, the stop arm 26 is located in the position shown by dotted lines, (Fig. II), Where it does not in any way interfere with the operation of the lever 13.

The process of making castings described in connection with my casting apparatus, is not .claimed herein, the said process being described andclaimed in an application for patent filed by me February 13, 1913, Serial No. 748,096. v 4

1. A casting apparatus comprising a melting pot, a pressure tube adapted to communicate with said melting pot, said tube V having a closure at its upper end and having said tu its lower end secured to the middle portion of the bottom of said melting pot, means for opening and closing communication between e and melting pot, a closure for the bottom of said tube located at the bottom of Y said melting pot, said closure having a discharge port through which molten metal may be discharged downwardly from said tube and melting pot, a vertically movable discharge valve at the bottom of said tube for opening and closing said discharge port, a valve stem secured to said valve and ex tending through the closure at the upper end of said tube, a spring tending to hold said valve upon its seat, and means for operating said valve stem.

sion valve being operable to open and close communication between said pressure tube and melting pot while the discharge valve is closed. i 8. A casting apparatus, comprising a melting pot a pressure tube-arranged within and adapted to communicate with said meltin pot, an admission valve for opening and closing communication between said pressure tube and melting pot, the apparatus being provided with a dischargeport through which molten metal may be discharged from said pressure tube into a die, a discharge valve adapted to open and-close said dis charge port, said discharge valve being separate from and having no direct connection with said admission valve, and the admission valve being operable to open and close communication between said ressure tube and melting pot while the disc large-valve is closed; combined with means for automatically locking' said discharge valve in its closed position while the admission valve is in .its open position.

. W. C. URBAN. In the presence of-- A. 'J. MCCAULEY, E. B. LINN. 

